George m



UNITED STATES PATENTfOFFICE.

GEORGE M. FORMBY, JACKSONVILLE, FLORIDA, ASSIGNOR TO FORMBY PETRINITE CORPORATION, OF JACKSONVILLE, FLORIDA, A CORPORATION OF DELAWARE.

PLASTIC COMPOSITION ANDPROGESS OF PRODUCING THE SAME.

No Drawing.

skilled in the art to which it appertains to make and use the same. i

This invention relates to cementitious compounds and processes of making the same and has for its object to provide a'composition of matter, and a method of producing it, which will be more efficient in action and less costly to employ than those heretofore proposed,

WVith these and other objects in View, the invention consists in the novel composition of matter, and in the novel steps and combinati-ons of steps constituting the process, all as will be more fully hereinafter disclosed and particularly pointed out in the claims.

In carrying out this invention I may take, for example, proportions of:

lalcium oxide, CaO, not less than lbs. Magnesium oxide, MgO, not over 2lbs. Calcium carbonate, CaCO about Qlbs. Calcium hydroxide, C'a(OH).,, about-20 lbs. Magnesium hydroxide, Mg(OH) about 6 lbs.

These compounds are thoroughly mixed in the dry state, and I then add suflicient water to form a creamy paste, and heat slowly until the water disappears. The mass is now allowed to cool, and is kept from contact with the air until ready for use, but preferably, it is reduced to a dry powder before storing it away. When it is to be used I finely divide said mass if it is not already in a powdered state, and I stir it slowly into hydrochloric acid, HCl, say of a strength of from 18 B.36 B., and until all of said acid is use-d up. This point will be reached when the mass ceases to give oif bubbles and changes from a yellowish to a dark ashy color. At the same time the previously evolved stifling fumes will have ceased.

With one hundred pounds of material as above set forth I would use about two hun- Specification of Letters Patent.

Application filed May 11,

Patented Mar. 21, 1922.

1920. Serial No. 380,496.

dred and fifty pounds of hydrochloric acid having a strength of 18 B. This mass at first may be said to have about the consistency of thick buttermilk, but after say twenty-four hours settling it separates into a mudlike substance at the bottom, and a supernatant fluid having about the consistency of a lubricating oil, and which will pour about as readily.

The foregoing procedure and composition of matter are or may be substantially the same as disclosed in my copending application No. 364,736 filed March 10, 1920 and entitled Cementitious compounds and processes of making the same.

According to this invention, on the other hand, I add to the liquid oxychloride composition thus produced from 4 to 10 volumes of water and stir in from 5 to 11 volumes of a commercial lime and preferably one containing about 3% of calcium carbonate or which is therefore said to be high in calcium. The mixture thus had is now brought to a boil and allowed to set for 24 hours, when it is ready for various uses, among them that of mixing with plaster of Paris to form a hard stone-like mass, suitable for making a large variety of objects.

The said oxychloride compound if mixed with a substantially equal volume of plaster of Paris, will be found to set without any objectionable contraction or expansion; while by varying the proportion of plaster of Paris the amount of expansion on setting can be varied, and by varying the proportions of the oxychloride compound present, the amount of contraction on setting can be controlled.

I further find by making a pasty creamlike mixture of substantially equal parts of plaster of Paris and said oxychloride compound, and applying this mixture with a brush or by means of a trowel to a plaster of Paris surface, I coat said surface with a layer which is very hard, one which may be readily made smooth and polished, one that is water proof, and one that does not crack on setting nor can it be detached without destroying said surface. In fact, owing to its high plaster of Paris content, it may be said to be integrally welded or fused to said plaster of Paris surface.

The addition of the above mentioned lime to the oxychloride compound of my said copending application, is found to add very materially to the strength of the oxychloride mmand o application, and also tothe eem'engts, plasters and'other substances, including 'p aster of Paris, with which the present oxyehlggide compound may be mixed. The reason for" this additional strength is not at present fully understood, but'it has been practically demonstrated many times.

The plastic substances composed of the above mentioned iox-ychloride compound and plaster-10f Paris ma be moldedinto tiles, artificial uones, 3113 .3 bod; of other-substances, which may lee-mixed with ooloning material or net as desired. Said substances may also be subjected to various pressure, in whiehoase they take on appearances awesombling marble or other; stories, according to the coloring matter they (mtain.

It is obvious that those skilled in the art may the fm'egoiug procedure without departing from the spirit ofthe invention, and therefore, I do not wish to be limited to theakiueldisolgosuneexoept as may be nequired b the claims. 1

What claim iss 1. The pnocess-of producing a plastic composition which omisistsin neacti on calcium hydrate with hydrochloric acid to proof Paris thereto substantially as duce a calcium oxychloride; addin water and lime to said oxychloride; heatm the mixture thus produced; and addiuf p aster described. 2. The process of pred-ucing a plastic composition which consists 1n reacting on calcium hydrate mixed with magnesium hydrate with hydrochloric acid to produce a calcium and magnesium 0 yc ride.;.adding water and lime to said oxychloride; heating the mixture thus produced; allowi said mixture to set; and adding substanti y an equal volume of plaster of Paris thereto, substantially as described.

8. The henein described new article of manufiaet-mzeqthe same eontain' a calcium oxychloride that has been heat? with lime inthe presence of water, and the com ound thus pmdueed mixed with plaster of :aris, I

substantially as described.

4. The henein described new article of manufacturethe sameoons' of calcium and magnesium oxychlorides that have been heated in a mixture of lime and water, and the compound thus roduesd mixed with substantially an aqua volume of plaster of Boris, substantially as described.

In testimony whereof I aflix my si ature.

GEORGE M. FOR BY. 

